dc.contributor | Universidade Estadual Paulista (UNESP) | |
dc.creator | Prochnow, L. | |
dc.creator | Chien, S. | |
dc.creator | Carmona, G. | |
dc.creator | Austin, E. | |
dc.creator | Corrente, J. | |
dc.creator | Reynaldo Ferraciú Alleoni, Luís | |
dc.date | 2014-05-27T11:21:59Z | |
dc.date | 2016-10-25T18:22:43Z | |
dc.date | 2014-05-27T11:21:59Z | |
dc.date | 2016-10-25T18:22:43Z | |
dc.date | 2006-10-01 | |
dc.date.accessioned | 2017-04-06T01:20:37Z | |
dc.date.available | 2017-04-06T01:20:37Z | |
dc.identifier | Communications in Soil Science and Plant Analysis, v. 37, n. 13-14, p. 2057-2067, 2006. | |
dc.identifier | 0010-3624 | |
dc.identifier | 1532-2416 | |
dc.identifier | http://hdl.handle.net/11449/69125 | |
dc.identifier | http://acervodigital.unesp.br/handle/11449/69125 | |
dc.identifier | 10.1080/00103620600770417 | |
dc.identifier | 2-s2.0-33745462523 | |
dc.identifier | http://dx.doi.org/10.1080/00103620600770417 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/890404 | |
dc.description | The general concept that low-water-soluble phosphorus (P) fertilizers should be more agronomically effective when applied to acidic soils was developed based on sources containing mainly calcium (Ca)-P compounds, but it may not hold true for sources with different chemical composition. To obtain information related to this issue, two important iron (Fe)-potassium (K)-P compounds present in superphosphates [Fe 3 KH 8 (PO 4 ) 6·6H 2 O, H8, and Fe 3 KH 14 (PO 4 ) 8·4H 2 O, H14] were prepared and characterized. These P sources were used to provide 30 and 60 mg P kg -1 as neutral ammonium citrate (NAC)+H 2 O-soluble P. Reagent-grade monocalcium phosphate (MCP) was used as a standard P source with high water solubility with an additional rate of 120 mg P kg -1 included. Also, mixtures of both Fe-K-P compounds and MCP were prepared to provide 0, 25, 50, 75, and 100% of the total P as MCP. All sources were applied to a clayey loamy acid soil (pH 5.3) classified as Rhodic Kanhapludult. The soil was incubated at two rates (0 and 10 g kg -1 ) of lime, which resulted in pH 5.4 and 6.8. Upland rice was cultivated to maturity. The H14 compound confirmed to be a highly effective source of P for the rice plants at both soil pH, as opposed to the H8, which was poorly effective when applied alone. When mixed with water-soluble P (WSP), the H8 was able to provide P to the plants with the maximum yield of upland rice reached with 54.8 and 80.5% of WSP for pH 5.4 and 6.8, respectively. The high agronomic performance of the H14 compound clearly indicates that this low-water-soluble P source cannot be deemed as ineffective at high soil pH. Copyright © Taylor & Francis Group, LLC. | |
dc.language | eng | |
dc.relation | Communications in Soil Science and Plant Analysis | |
dc.rights | info:eu-repo/semantics/closedAccess | |
dc.subject | Cationic impurities | |
dc.subject | Phosphate fertilizers | |
dc.subject | Upland rice | |
dc.subject | fertilizer application | |
dc.subject | paddy field | |
dc.subject | pH | |
dc.subject | superphosphate | |
dc.subject | upland region | |
dc.title | Agronomic effectiveness of cationic phosphate impurities present in superphosphate fertilizers as affected by soil pH | |
dc.type | Otro | |